Quantitative PVP mapping in PVDF hollow fiber membranes by using Raman spectroscopy coupled with spectral chemiometrics analysisE. Dufour, S. Gassara, E. Petit, C. Pochat-Bohatier and A. DerataniEur. Phys. J. Special Topics, 224 9 (2015) 1911-1919DOI: https://doi.org/10.1140/epjst/e2015-02509-5